An important second messenger in hormonal action is
A) cAMP.
B) calcitriol.
C) insulin.
D) calcium.
E) glucagon.

Question

Quizplus · Accepted Answer

cAMP (cyclic adenosine monophosphate) is a common second messenger in many hormonal pathways, including those involving epinephrine, glucagon, and thyroid-stimulating hormone. It is generated from ATP by adenylate cyclase in response to a hormone binding to its receptor on the cell surface. cAMP then activates protein kinase A, which can lead to changes in enzyme activity, ion channel function, and gene expression.

An Important Second Messenger in Hormonal Action Is